False work.



D. B. LUTBN.

FALSE WORK.

APPLICATION FILED MAY 24, 1912.

1,106,880, Patented Au 11,1914;

WITNESSES subjected.

s Parana marten.

DANIEL B. LUTEN, or mnmneroms, INDIANA.

FALSE won r.

cense.

Specification of Letters Patent. PatentedLA g- 11 1914 Original application filed November 1, 1806, Serial N 0. 341,605. Divided and this application filed May 24,

Y 1912. Serial no. 699,534. Y

To all whom it may concern: I

Be it known that I, DANIEL B. LUTEN a citizen of the United States, residing at ndianapolis, in the county of Marion and State of Indiana, have'invented a new and useful False ork, of which thefollowing is a specification.

My invention relates to improvements in falsework, especially torconcre'te structures,- and heater its purpose to provide a compression member for such falsework that will have great strength without increased costfor materials or labor, and which is specially adapted to be removed in such a manner that there are gradually developed in the structure supported on the falsework.

the stresses to which'such structure is to be This application is a division of an applieation filed by me November 1, 1906, Serial No; 341,605. l

The invention is illustrated in the accompanying drawings in which the same reference characters describe like partsthroughout the several views.

Figure 1 is an elevation of a false work of. my improved type with a superimposed arch of a bridge. 'Fig. 2 is an axial section of the parts shown in Fig. 1 andat right anglesthereto- Fig. 3 is a detail of a por-' tion of the't'alse'work on an enlarged scale,

and Fig. 4 is a section on line 4 4 of Fig.

The joists 30 of the falsework, usually covered with a sheeting 30 for forming and holding the-concrete or other material of which the proposed structure, such as the arch A, is to be built, are supported upon posts each of which consists of two members 31 and the sum of the individual strengths of which is not enough to support the load applied to the two combined. Onc'member 31 may be secured to the joist 30, as by nails or otherwise, these members being placed upon footings 33. A nailed or other similaroint is somewhat unreliable and after the members 31 are placed on their footings, the other members 32 are therefore preferably fitted under the joists and brought accurately to position and bearing by wedging or otherwise. The member 32 is arranged with relation to the member 31 to form apost substantially T shaped in cross-section,

as shown in Fig. 4, and is connected to the member 31- by means which, while in actlveposition, Wlll ntimately associate the two members so that each will strengthen the other but which may be readily brought to a condition giving independence of the two two members is by wires 36 passed around the two members 31 and 32- and having their ends twisted together to hold the two members 31 and 32 securely together causing one to brace the other. The supports are braced bybraces87 all of which, wherethe falsework is used for bridge construction, lie in a plane; substantially parallel with the stream that is, parallel with the axis of the bridge arch, saidbrace members being attached to that one-oi the members of the supporting posts which will, under the applied load, tend t'obuckle in the direction of the axis of theYarch; This construction results in extremely light posts of great strength, placed with minimum of labor, and with secure connections, yet which will serve as an ex? tremely rigid falsework support during the erection of any structure.

After the falsework is completed, the structure for which it is built is constructed on it, such structure being here illustrated as a concrete arch A of a bridge. After this structure is sufficiently set, by selectively cutting wires 36 and withdrawing braces 3'7 thesupport ofthe falsewmk can be very gradually withdrawn tron-i beneath the com pleted structure. This withdrawing or the braces 37 makes the arious. supporting posts independent of each other, and the cutting ofthe wires 36 rcsolms into its two elements,

31 and 32, the composite s-uppmrting post forn'ied by said two elements when they are connected by such wires. The resolution into its elements of the composite su iporting post allows the two elements to buckle independently, in transverse directions, with the result that the combined load which the objectionable.

is first nailed flat against the joist'30 and the operation repeated for each post and joist until the line of posts and joists is complete, after which it is set in position in-the pro-v posed structure. The member 32 is then wedged under the joist and supports the major part of the load because of its" end bearing the joist, the member 31 serving mainly to stitien 32. Hence the member 31 may be made of thinner and wider material as shown by Figs. 1 and 2. As this member will effectually resist buckling of .the other member 32 there is therefore, save in exceptional cases, no necessity for sway bracing transverse to the direction of the stream, that is, in line with the joists, when necessary struts 38 may be provided to take care of any horizontal thrusts on the falsework transverse to the arch axis. But the posts may require sway bracing 37, parallel with the flow of the stream, WlllCh of course is not :I claim: 1

l. A falsework centering containing com pound compression members in series for supporting a load, each com ression member consisting of a plurality o pieceseach of which has major and minor dimensions transverse to its length, the major dimension of one piece being greater than the major dimension of another iece and being arranged transversely to t at major dimension of the other piece and transverselyto the series of compression members, and releasable connecting members uniting the pieces of each compression member; and sway bracing uniting the substantially parallel pieces of a plurality of said compression members.

2. A falsework centering comprising a joist supported by a compound compression member composed of a plurality of pieces each" having major'and minor dimensions transverse to its length, the major dimension of one piece being arranged longitudinally of i and overlapping the joist and trans! versely to the major dimension of another piece of the compression member, and a re leasable connecting member to unite the pieces of the compression member.

3. A falsework centering comprising a joistsu-pported by a compound compression member composed of a plurality of detachably interconnected pieces, each having major and minor dimensions transverse to its length, the major dimension of one piece being arranged longitudinally of and overlapping the joist and transversely to the major dimension of another piece of the compression member with end bearing against the oist.

4. A falsework centering containing compound compression members for supporting a load and each composed of a plurality of pieces having major and minordimensions transverse to their lengths, the major ditnew sion of one piece lming arrmigml (,j'm eversely to the major dimension of another piece, and a withdrawable connection to unite the pieces of each compression member.

5. A falsework centering for a stream-.

crossin bridge comprising compound columns for supporting a load and each conmember composed of a plurality-of releasably interconnected longitudinal pieces, one of said pieces having ma or and minor d1:

mensions transverse to its length, the major dimension of said piece being arranged longitudinally of and overlapping the joist, and another of said against the joist.

7. A falsework centering containing com-.-

pound compression members for supportin a load, each of which members is compose of two pieces having major and minor dimensions transverse to their lengths, the two pieces being set together so that their comined cross section shaped with the cross of the T longer than the stem thereof, a releasable connection between the two pieces, and sway bracing extending between compression members in planes parallel to the stems of the Ts.

8. A falsework centering containing compound compression members for supporting a load, each of which members is composed of two pieces having major and minor dimensions transverse to their lengths, the two pieces being set together so that their combined cross section is approximately T shaped, a releasable connection between the two pieces, and sway bracing extending between compression members in planes parallel to the stems of the Ts.

9. A falsework centering containing compound compression members for supporting a load, each of which members is composed of two pieces having major and minor dimensions transverse to their lengths, the two pieces being set together so that their combined cross section is approximately T pieces having end bearing is approximately T.

shaped, and a releasable connection between the two pieces.

10; A falsework centering containing compound compression members for supporting a load, each of which members is composed of'two pieces having major and minor dimensions transverse to their lengths, the two pieces being set together so that their combined cross section is approximately shaped with the cross of the T longer than the stem thereof, and a releasable connection between the two pieces.

11. A falsework centering containing com pound compression members for supporting a load, each of said members being composed of a plurality of pieces having major and minor dimensions transverse to their lengths, the major dimension of one piece being arranged transversely to the major dimension of another piece, and a tie-Wire uniting the pieces of each compression member.

12. A falsework centering containing compound compression members for supporting a load, each of which members is composed of two pieces having major and minor dimensions transverse to their lengths, the two ieces being set together so that their comliined cross section is approximately T 20 shaped, and a tie-Wire joining the two pieces.

13. A falsework centering for a bridge comprising compound columns for supporting a load and each consisting of a plurality of releasably interconnected longitudinal pieces, one of said pieces being wider than another of said pieces and arranged with its wider dimension parallel to that of similar pieces of other columns, and sway bracing attached to said columns and t'ansverse to the Wider dimensions of such wider pieces.

In witness whereof, I have hereunto set my hand and seal at Indianapolis, Indiana, this twentieth day of May, A. D. one thou sand nine hundred and twelve.

G. B. SCHLEY, 1 MAY LAYDEN. 

